PC Server farm

Hi,

I wanna setup a high speed, high availibility server in linux for a
busy site (linux, apache, mysql). The resources available to me are
very scarce viz:

a. 4 celeron pcs with 512 mb ram
b. Three 256 kbps internet connection from different isp's

How can I make use of the above so that a reliable and high speed
network is availble which efficiently uses the available internet
bandwidth. How can the systems and internet connections be
interconnected

If necessary I can add 2-3 more PCs and some more internet connectivity
(each limited to 256 kbps). I have read something about ultra
monkey/mysql/apache clusters etc. Although I am no network expert, I am
ready to learn stuff to implement the above.


Regards,
chival c

(E-Mail Removed) wrote:

> Hi,
>
> I wanna setup a high speed, high availibility server in linux for a
> busy site (linux, apache, mysql). The resources available to me are
> very scarce viz:
>
> a. 4 celeron pcs with 512 mb ram
> b. Three 256 kbps internet connection from different isp's
>
> How can I make use of the above so that a reliable and high speed
> network is availble which efficiently uses the available internet
> bandwidth. How can the systems and internet connections be
> interconnected
>
> If necessary I can add 2-3 more PCs and some more internet connectivity
> (each limited to 256 kbps). I have read something about ultra
> monkey/mysql/apache clusters etc. Although I am no network expert, I am
> ready to learn stuff to implement the above.
>
>
> Regards,
> chival c
>
sell those four and buy one real server?

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.

In comp.os.linux.networking CJT <(E-Mail Removed)>:
> (E-Mail Removed) wrote:

>> Hi,
>>
>> I wanna setup a high speed, high availibility server in linux for a
>> busy site (linux, apache, mysql). The resources available to me are
>> very scarce viz:
>>
>> a. 4 celeron pcs with 512 mb ram
>> b. Three 256 kbps internet connection from different isp's
>>
>> How can I make use of the above so that a reliable and high speed
>> network is availble which efficiently uses the available internet
>> bandwidth. How can the systems and internet connections be
>> interconnected
>>
>> If necessary I can add 2-3 more PCs and some more internet connectivity
>> (each limited to 256 kbps). I have read something about ultra
>> monkey/mysql/apache clusters etc. Although I am no network expert, I am
>> ready to learn stuff to implement the above.

> sell those four and buy one real server?

Or/and get a faster connection, one of them probably setup could
be well able to outperform the bandwidth. ;-)

Honestly, he could build two LVS (www.tldp.org) cluster out of
them, one for mysql and the other for apache, Remaining problem
would be shared storage for the db, SAN/NAS would be nice.

It all depends how much downtime you one afford, with his crap
hardware there's not much hope. Presuming he hasn't even enough
disks to run softraid?

--
Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
#bofh excuse 299: The data on your hard drive is out of balance.

Michael Heiming wrote:
> In comp.os.linux.networking CJT <(E-Mail Removed)>:
> > (E-Mail Removed) wrote:
>
> >> Hi,
> >>
> >> I wanna setup a high speed, high availibility server in linux for a
> >> busy site (linux, apache, mysql). The resources available to me are
> >> very scarce viz:
> >>
> >> a. 4 celeron pcs with 512 mb ram
> >> b. Three 256 kbps internet connection from different isp's
> >>
> >> How can I make use of the above so that a reliable and high speed
> >> network is availble which efficiently uses the available internet
> >> bandwidth. How can the systems and internet connections be
> >> interconnected
> >>
> >> If necessary I can add 2-3 more PCs and some more internet connectivity
> >> (each limited to 256 kbps). I have read something about ultra
> >> monkey/mysql/apache clusters etc. Although I am no network expert, I am
> >> ready to learn stuff to implement the above.
>
> > sell those four and buy one real server?
>
> Or/and get a faster connection, one of them probably setup could
> be well able to outperform the bandwidth. ;-)
>
> Honestly, he could build two LVS (www.tldp.org) cluster out of
> them, one for mysql and the other for apache, Remaining problem
> would be shared storage for the db, SAN/NAS would be nice.
>
> It all depends how much downtime you one afford, with his crap
> hardware there's not much hope. Presuming he hasn't even enough
> disks to run softraid?
>
> --
> Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
> mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
> #bofh excuse 299: The data on your hard drive is out of balance.

is something worthwhile possible, with say 20 to 30 commodity pc's and
multi homing different internet connections?

Michael Heiming wrote:
> In comp.os.linux.networking CJT <(E-Mail Removed)>:
> > (E-Mail Removed) wrote:
>
> >> Hi,
> >>
> >> I wanna setup a high speed, high availibility server in linux for a
> >> busy site (linux, apache, mysql). The resources available to me are
> >> very scarce viz:
> >>
> >> a. 4 celeron pcs with 512 mb ram
> >> b. Three 256 kbps internet connection from different isp's
> >>
> >> How can I make use of the above so that a reliable and high speed
> >> network is availble which efficiently uses the available internet
> >> bandwidth. How can the systems and internet connections be
> >> interconnected
> >>
> >> If necessary I can add 2-3 more PCs and some more internet connectivity
> >> (each limited to 256 kbps). I have read something about ultra
> >> monkey/mysql/apache clusters etc. Although I am no network expert, I am
> >> ready to learn stuff to implement the above.
>
> > sell those four and buy one real server?
>
> Or/and get a faster connection, one of them probably setup could
> be well able to outperform the bandwidth. ;-)
>
> Honestly, he could build two LVS (www.tldp.org) cluster out of
> them, one for mysql and the other for apache, Remaining problem
> would be shared storage for the db, SAN/NAS would be nice.
>
> It all depends how much downtime you one afford, with his crap
> hardware there's not much hope. Presuming he hasn't even enough
> disks to run softraid?
>
> --
> Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
> mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
> #bofh excuse 299: The data on your hard drive is out of balance.

is something worthwhile possible, with say 20 to 30 commodity pc's and
multi homing different internet connections?

Michael Heiming wrote:
> In comp.os.linux.networking CJT <(E-Mail Removed)>:
> > (E-Mail Removed) wrote:
>
> >> Hi,
> >>
> >> I wanna setup a high speed, high availibility server in linux for a
> >> busy site (linux, apache, mysql). The resources available to me are
> >> very scarce viz:
> >>
> >> a. 4 celeron pcs with 512 mb ram
> >> b. Three 256 kbps internet connection from different isp's
> >>
> >> How can I make use of the above so that a reliable and high speed
> >> network is availble which efficiently uses the available internet
> >> bandwidth. How can the systems and internet connections be
> >> interconnected
> >>
> >> If necessary I can add 2-3 more PCs and some more internet connectivity
> >> (each limited to 256 kbps). I have read something about ultra
> >> monkey/mysql/apache clusters etc. Although I am no network expert, I am
> >> ready to learn stuff to implement the above.
>
> > sell those four and buy one real server?
>
> Or/and get a faster connection, one of them probably setup could
> be well able to outperform the bandwidth. ;-)
>
> Honestly, he could build two LVS (www.tldp.org) cluster out of
> them, one for mysql and the other for apache, Remaining problem
> would be shared storage for the db, SAN/NAS would be nice.
>
> It all depends how much downtime you one afford, with his crap
> hardware there's not much hope. Presuming he hasn't even enough
> disks to run softraid?
>
> --
> Michael Heiming (X-PGP-Sig > GPG-Key ID: EDD27B94)
> mail: echo (E-Mail Removed) | perl -pe 'y/a-z/n-za-m/'
> #bofh excuse 299: The data on your hard drive is out of balance.

is something worthwhile possible, with say 20 to 30 commodity pc's and
multi homing different internet connections?

Multihoming dosn't work on the small scale, you need to be big enough
to have your own subnet and routing numbers. The internet backbone has
to be aware that there is more than one way to get to your subnet, so
you need to be running BGP. The smallest connection suitable for this
kind of setup is a 100mbit. In short, multihoming just isnt possible on
this scale.

Build a good rack server and have it colocated in a multihomed
datacenter. PC parts are ok as long as you avoid the cheapest junk.
Make sure to get a server grade PSU! Harddrives will fail, sooner
rather than later, its just a mater of time. So make sure its tollenant
of HD failour. For my cheap servers I just have a switch connected to
the master/slave selection. So if the master fails I just call up the
datacenter and tell them to hit the switch and power cycle the server.